If you feel any vibration or shimmy in the steering wheel or if you feel the same things in the vehicle you have a tire out of balance. As you need to rotate your tires at least every 10,000 miles that is a good time to have the tire balance checked.
when they are no longer balanced.
Yes
Your tires probably just need to be balanced.
If they are already balanced then no you dont. but if they are not balanced yes you do. If you dont you will wear out the tires faster than if they were balanced.
Could be your tires need to be balanced or you need new tires.
Tires need to be balanced and re-aligned
Tires may need to be balanced.
Tires need to be balanced
If your car's tires are out of balance it will usually cause a vibration or thumping. If your wheel alignment is out it will usually cause the car to pull to one side.
A alignment is needed if its pulling to one side. Where as a balance is needed if the car is viberating.
Usually you won't hear much more noise from a tire if it's not balanced, but you will feel a vibration when you get up to highway speeds. If you take it up to 60 or 70 mph and feel a vibration, you probably need to get them balanced.
Hey Laurie==It isn't esential but you need to rotate them when it recommended and balanced when they need it. Goodluck Joe